Given the data 21, 13, 13, 37, 13, 23, 25, 15: What is the outlier in the data? What is the mean with the outlier? What is the mean without the outlier?
13; 21; 17.6
37; 20; 17.6
37; 17.6; 20
13; 17.6; 21
The outlier in the data is 37.
The mean with the outlier is (21+13+13+37+13+23+25+15)/8 = 20.
The mean without the outlier is (21+13+13+13+23+25+15)/7 = 17.6.